Expanding reamer and tap.



No 689,666. Patented 690.24, I90].

W. C. ANDERSCIN. I

EXPANDING NEAHER AND TAP.

(Application filed Dec. 24, 1900.)

(No Model.) I 2 Sheets-Sheet l.

Patented Dec. 24, I91" W. C. ANDERSON.

EXPANDING BEAMER AND TAP.

(Application' filed Dec. 24, 1900.)

2 Sheets-Sheet Z.

(No Model.)

I Fiq FiqJX. 3 b I D firm-ass; 6

UNITED STATES PATENT OFFICE.

IVILBUR C. ANDERSON, OF MISHAWAKA, INDIANA, ASSIGNOR TO CHARLES S; JOHNSON, OF-PITTSBURG, PENNSYLVANIA.

EXPANDING REAMER AND TAP.

SPECIFICATION forming part of Letters Patent No. 689,666, dated December 24, 1901. Application filed December 24, 1900. Serial No. 41,007. (No model.)

To all whom it may concern: the work being reamed or tapped. Likewise Beitknown thatLVVILBUR O.ANDERsN,a on the periphery of body A are a suitable citizen oftheUnited States, residing atMisha-' number of slots or grooves z z lengthwise 0t waka, in the county of St. Joseph and State of the same for the reception of the cutters B B Indiana,haveinvented ordiscoverednewand and clamps C O, the contacting surfaces of 55 usefulImprovements in Expanding Reamers B B and O 0 being beveled to conform with and Taps, of which the following is a'specifione another, thereby giving a perfect clampcation. ing contact the full length of cutter. Under In theaccompanyingdrawings,which make such cutter B B is a taper slot y for the re- IO part of this-specification, Figure I is a longiception of the wedges D D, which may be of 60 tudinal section on line I of Fig. II. Fig. II such depth as the diameter of the bodyA will is a cross-section on line II II of Fig. I, these allow and running out to zero, thereby givtwo views showing the skeleton body of the ing an inclined plane for the travel of the reamer without the wedges and cutters. Fig. wedges D D.

III is a cross-section on line III III of Fig. BodyA is recessed to and threaded at a to 6 IV, and Fig.. IV a longitudinal section on receive the hollownut E, whose shoulder-colline IV IV of Fig. III, these two views showlar K engages with the transverse grooves J J ing the body of the reamer with the wedges, in the wedges D D, providing means for movcutters, and female nut for drawing up the ing said wedges in and out.

wedges. Fig. V is a side elevationof the The nut E is provided with two holes 6 e 70 reamer; Fig. VI, a section of the female nut for a spanner-wrench. The body,Ais turned for drawing up the wedges. Fig. VII is a smaller at its back end for a collar F, thus perspective of the wedge. Fig. VIII is a perallowing the grooves z z for cutters B B and spective of the cutter. Fig. IX is a perspecclamps C C to be cut through to end of A.

tive of the clamp; and Fig. X, a side eleva- The collar F is held in place by screws ff. 75 tion, partly in. section, showinga .chuck The collar F thus gives a square end'backing-reamer employing a male collar-screw' ing for the cutters and prevents slipping back in place of hollow nut for drawing up the of cutters or when being used'as a'tap, and Wedges. cutters of different threads are used, allow- My-invention, generally stated, relates to ing the user to replace the cutters in proper 80 tools of the class known as expanding or position without danger of changing the lead adjustable reamers and taps, which are of thread. capable of being enlarged or reduced in size To expand the reamer or tap to larger size, to ream or tap holes of varying sizes within I loosen the screws GGin clamps C O, screw certain limits or enlarged to compensate for in the nut E, which forces the wedges D D 85 wearand'sharpening. The general objections up the inclined plane against the bottom of to prior tools of this class has been, first, lack cutters B B, expanding them to the desired of rigidity and solidity; second, inability to diameter, then tighten the screws G G, which ream or tap to the extreme bottom or shoulforces the bevel of clamps O 0 against the 40 der of a hole, and, third, expensive to manubevel of the cutters B B, and then screw in the 90 facture and too expensive and delicate a tool not E slightly, which forces the wedges D D to put into the hands of inexperienced workfirmly against the cutters B B, thereby givmen. ing an absolutely firm seat to the cutters. To

The tool consists of reamer or tap body A, reduce in size, I slightly loosen the screws cutters B B, clamps O O, wedges D D, nut G G and screw out nut E, which withdraws 5 E, collar F, and clamping-screws G G, all of the wedges D D, and then tighten the screws which are shown separately and assembled. G G, which forces cutters B B against the The bodyAhas ahole bored longitudinally wedges, thereby reducing the cutting diamethrough its center for the reception of arbor ter of the reamer or tap. X, which may be of Various lengths to suit Fig. Xrepresents what is commonly known IOC as a chucking-reamer, which also may be used as a tap by having threads out upon the cutters B B. This differs from shell reamer and tap previously described only in that the body A is solid and having shank Q of convenient length; also, in the operation of the wedges D D by a collar-screw H in place of nut E, which permits of the reamer or tap being of smaller diameter than is possible with the shell, reamer,and grooves; also,gives a greater incline to the plane for the travel of the wedges.

In the chucking reamer or tap the body A is drilled and tapped for the screw H and recessed to receive the collar lb of the screw. The collar h on the screw II engages in the transverse grooves J J in wedges D D and operates the same as heretofore described. The head of the screw H is slotted at 7L2 for a screw-d river.

Some of the advantages of my reamer are these: There are no screws in the cutters; but the same are held in position by clamps. The cutters can be rapidly withdrawn and exchanged by unscrewing the clamps. The tool will ream or tap to the shoulder or bottom of the hole, there being no projections of any description beyond the forward cutting ends of the cutters. By a single and rapid movement the diameter may be increased or diminished, and the same size and style of cutters, clamps, and wedges may be used for difierentdiameters. The constructionis rigid and solid and comparatively inexpensive to manufacture, for the reason that all the parts can be machined in numbers and quickly assembled and are not likely to be injured by inexperienced workmen. The collar which acts as a backing end for the cutters presents a square face against the butt-end of each cutter, permitting the replacing of threadcutting cutters to their exact position after removal. This backing-collar also permits the peripheral grooves for the cutters to be out clear through from end to end of the body. There is a broad contact between the wedges and the hollow nut in the shell design and between the wedges and the screw in the chucking design, which gives a positive and sure movement to the wedges without danger of breaking or springing the parts.

In the appended claims by cutters I mean either threaded or non-threaded.

Having described my improvement, I claim 1. In expanding reamers or taps, the combination of a body having longitudinal grooves on its periphery, a series of cutters and clamps seated in said grooves, a series of wedges located in said body beneath the cutters, grooves in said wedges and a hollow nut screwing upon a projection in a recess in the forward end of said body and provided with a flange to engage said grooves in said wedges.

2. A body for an expansible reamer or tap, said body having a larger diameter at its forward than at its rear end, grooves in the periphery of said body extending longitudinally through the portion of larger diameter, tapering slots below said grooves, a recess in the forward end of said body, and a screw-threaded projection in said recess.

3. A hollow body for an expansible reamer or tap, said body having a larger diameter at its forward than at its rear end, grooves in the periphery of said body extending longitudinally through the portion of larger diameter, tapering slots below said grooves, a recess in the forward end of said body, and a screwthreaded projection in said recess.

4. In expanding reamers or taps, the combination of a body, a series of longitudinal grooves on the periphery of said body, a recess in the forward end of said body, a projecting portion of said body in said recess, screw-threads on said projection, a nut engaging the serew portion of said projection, the rim of said nut engaging in grooves in the forward ends of a series of wedges,said wedges seated in said longitudinal grooves and adapted to radially adjust a series of cutters seated upon said wedges.

Signed at Mishawaka this 11th day of December, 1900.

WILBUR C. ANDERSON.

Witnesses:

A. H. HENWOOD, JOHN A. CAMPBELL. 

